Allit Vario Plus Connector

Bought some storage boxes with drawers recently and wanted to stack them. Luckily the "Allit Kleinteilemagazin VarioPlus Basic 54" (small parts cabinet with 33 little drawers) has some nice holes at the side so that they can easily be clamped together.

I created some very simple clips (so simple that I was uncertain if I should really upload it), mounted two on each side to connect two cabinets - done. Multiple boxes can be stacked like this (in my case 5)

It's still recommended to fix the upper box to the wall or at least support the front of the lowest cabinet (old credit cards are just fine), so that the tower slightly "leans" against the wall. Haven't even attached any screws yet - the 5 story tower seems to be still stable (having put all the heavy stuff into the lower boxes)